Fire door



March 12, 1935.

J. l-JIOLLENDER FIRE DOOR Filed Sept. 16, 1951 2 Sheets-Sheet 1 11vVENTOR I B Y 2;

I ATTORNEYS March 12, 1935. J. HOLLENDER 1,993,736

' FIRE noon Filed Sept. 16 1931 2 Sheets-Sheet 2 Patented Mar. 12, 1935"UNIT u .FIRE noon,

I Jean Hollenden: Bogota, N. J., assignor to Frank- Railway SupplyCompanyyNew York, N.*Y.; a corporation: of Delaware;.Application"September '16, 1981', Serial'No. 563,044

' 100mm. A (or: 110-176).

I This invention relates .to fire doors, andespeciallyrtodoors forlocomotive fire boxes. I I

An important object of the invention is to provideandoor whichwilliafford the engineerand fireman the maximum of protection in case ofaccident or structural failure-resulting indischarge of steam, inside:the,- firebox,-even in the case of hig-hapressure locomotives 1using-boiler pressures. as great as .400 lbs. per sq. or over.

other objects and advantages that .can be realized throughthe inventionwill appearfrom my description hereinafterof-a preferred embodiment.

In the drawings:

Fig. 1 showsa vertical-section through afirebox dooropening equippedwithone. form of door conveniently embodying my invention, takenas indicatedbythe. line and. arrows 11 in Fig. 2.

Fig. .2-is-a front view ofthe door and itseassociated parts andoperating mechanism,.from outsidethe firebox. I

.Fig. 3 ;is a side elevationof-the parts-outside the firebox, fromthe.left of Figu2. I

. Fig. lshows-a-vertical sectionthrough certain :parts of the 1,operating I mechanism, taken as; indicated by the line and arrows 44 inFig.2;

' In Figs. :1 and-2zis shown .flffiIE-bOX water-wall .5.with.a dooropening; or doorway. of rectangular, round-cornered outline into whichthe .door frame isadapted to fit. lnthe present instance, .the doorto be.described'is. shown as beingiap- ,pliedtoa stoker firedlocomotivethestoker discharge tubet being illustrated as a occupying the lowerportion or the opening .inthewater wall. The invention, however, nottobe limited to ythis type ofwconstructionbecause ,my improved .doorcouldbe designed for use independently .o

a stoker.

The-door frame compriseswa part orseotion 6 .mounteddirectly in the dooropening oftheifire- -.b0x, and aflording a seat-shoulder 7 forthedoor.8, and also. in the present .instance anoutside -part. or .section 9mounted against the .firebox .wall .5 around the outward projectingflangeor -marginll of the part 6, and secured to.the latter .bybolts-12- Fhe seat-shoulder 7 directly sustains-the door 8 against pressureinside the firebox. I I

The frame section 6 that includes this doorseat 7 also has a flange orshoulder .13 thatabuts againsttheinside oft-hefireboxfi around the door.opening .and (assisted by the inward and downward flareof the frameSat-its lower side) sustains the frame .againstoutward pressure. on thedoor. Thus the stud bolts14 (around the door opening)v thatsecure theouter frame section 9 need only benumerousand strong enough to hold andsupport it firmlyunder the stresses imposed by the partsand mechanismmounted on it, since they :do not. have to withstand the outward.'pressure on thedoor in case of rupture of the inside firebox wall. IThe inside frame or, section 6 can readily be installed by inserting itendwise through the fire- 10 box doorway, then -turning-it. parallelwith the wall 5,-and working itback intothe doorway .to thepositionshown in Fig. 1. 'Thiscan be done after theoutside frame orsection 9' has beensecured .in'placetbythe stud-bolts '14. 'I'he twosections are. fastened --togetlier by the bolts 12, and theinner-sectionthuspsecurely held and definit ely fixed iii-position.

As here :shown, the outer frame 9 preferably .carriesa-thedoor-operating mechanism, including 20 a shaft 15. mounted iii-bearing"lugs-16, 16- on the frame 9. This shaftl-Sisoperable either manuallyior-byifiuid pressure, and is suitably connected toytherdoorp8. Asshown, however, the .door 8 itself =istnot (preferably) supported bytheshaft. 15, but from, theinnerframe -6. Forthis tpurpose "(Figsp-l and-2) ,-the door 8" has hingelugs 17, which are accommodated: in recessesin the frame 6 and pivoted on pins 18 removably .mounted in bosses.orenlargements '19- at the ,sidesof the, frame. .The shaft: has crankarms :20 --20 ifixed..thereon whichare connected by links :21, :21toears-or :lugs '22, 22 onthe door 8, so that when the shaft 15 I isturned something less than 90 counterclockwise (Fig. 1),-the door isswung open' inward-asshown in dotted lines. Wh'en, on=the otherhandythe'opening force applied to the-shaftdais-released, the door8-closes automatically, of its own weight. Any pressure "or explosiveforce-acting on'the door 8 from'in- "side the furnace 5 also tends toclose it.

For manually operating the door 8, there is a 'handlever 25'mounted'inacollar-block 26 on the shaft 15. A pull outward and downward on the"lever 25 (Fig. 3) turns the shaft 15 counter-clockwise'(Fig. '1) andopens the door 8. As shown 'in'Fig.'2, the hand lever 25 ispivoted tothe block 26 at 27, so that the lever can beswung to the left from thevertical-and engaged-in a notch or greater than the weight of the door 8is brought.

to bear, thus allowing the door to close at once under pressure in thefirebox, regardless of the position of the hand lever 25.

For power operation of the door 8, there is a fiuid motor comprising acylinder 35 mounted on the frame 9, with a piston 36 connected by a link37 to a crank arm 38 fast on the shaft 15. Pressure fluid may beadmitted to the cylinder 35' above the piston 36, or exhaustedtherefrom, to open the door 8'orallow it to close, through a pipe 39controlled by a suitable foot-operated valve device 40, such as commonlyused for controlling the operation of furnace doors. A pipe 41 is shownconnected to the valve device 40 for supplying pressure fluid from anysuitable source,such as the compressed air reservoir (not shown) of anair brake system. I i

To permit door-opening operation of the shaft 15 by the piston 36 evenwhen the hand lever is locked in door closed position; a lost-motionconnection may be provided between the shaft 15 and the, clutch collar30. For this purpose, there is a key 43 projecting from the shaft 15,and the collar 30 has a segmental clearance-recess 44 corresponding inangularextent to the door-opening movement of the shaft, as shown inFig. 4. The positions of the parts here shown are those when the door 8is closed and the handle 25 in its corresponding upright position.Obviously, the shaft 15 is free for the necessary door-opening movementin the direction of the arrow, while the handle 25 remains stationary.Or like movement of the handle 25 will open the door, through engagementof the upper shoulder of the collar-recess 44 with the shaft key43,--the piston 36 then moving idle in the cylinder 35, both of whoseends are vented except when pressure fluid is admitted to the upper end.

It will be seen that I have provided a door construction in which theframe 6 is in no way dependent upon bolts for holding it in position ashas been customary in previous practice. On the contrary by myimprovements the frame 6 is made to overlap the inside edges of the dooropening so that any outward pressure due to the escape of steam withinthe fire box only serves to force the frame 6 more tightly to its seat.

I claim:-

1. Means for closing a doorway through a water leg of a locomotive firebox, including in combination, a door frame having an enlarged portioninside the box constructed and arranged to engage around the doorwayopening so as to seat itself against the inner wall of said water legunder pressure from within the box, a door opening inwardly into thebox, and a seat on said frame for sustaining the door againstoutwardpressure itself against the inner wall of said water leg underpressure from within the box, a door mounted on said frame so as to openinwardly into the fire box and a seat on said frame for sustaining thedoor against outward pressure from within the box.

3. Means for closing a doorway through a water leg of a locomotive firebox, including in combination, a door frame having a portion adapted toline the opening through the water leg, said frame also being formed forendwise insertion through the opening and having an inner enlargedportion adapted to seat against the inner wall of said water leg whenreturned to normal position and retracted into the opening whereby it issustained against outward pressure from within the box, a door mountedon said frame to open inwardly into the fire box, and a seat on saidframe for sustaining the door against outward pressure from within thebox.

4. The combination with a firebox doorway, of a door frame engagedinside the firebox and extending outward into said doorway, and providedwith a hinge-lug recess in its top; and an inward opening door providedwith a hinge lug pivoted in said recess, said door closing outwardagainst said frame. 5. The combination with a firebox doorway, of a dooropening inward into the firebox, a door frame extending-into the fireboxand affording a seat for sustaining the door against outward pressurefrom within the firebox, and a door frame extension outside the fireboxcarrying the door operating mechanism. I r

6. The combination with a firebox doorway, of

a door frame engaged inside the firebox and exmounted on said frame, asupplemental door frame outside the firebox, a door operating shaft'rotatably mounted on the latter frame, and a. link operating connectionfrom said shaft to the door.

8. The combination with a firebox doorway, of

a door opening inward into the firebox and clos- I ing outward; a shaftwith operating connection to the door; and means for operating saidshaft including coacting clutch members thereon with inclined engagementsurfaces, and spring means normally holding said clutch members engaged,but yielding to permit disengagement of the clutch and independentmovement of the shaft and door when the door is subjected to abnormalpressure from the firebox while in its open position.

9. Means for closing a doorway through a water leg of a locomotive firebox, including in combination, a door frame extending through theopening in the water leg with an inner enlargement adapted to seatagainst the inner wall of the water leg whereby it is'sustained againstoutward pressure from within the box, and a supplemental frame outsidethe water leg secured to the outer portion of said first frame andadapted to seat against the outer wall of the said water leg whereby tosustain said first portion against movement into the fire box.

10. Means for closing a doorway through a water leg of a locomotive firebox, including in combination, a door frame extending through theopening in the water leg with an inner enlargement adapted to seatagainst the inner wall of the water leg whereby it is sustained againstoutward pressure from within the box, and a supplemental frame outsidethe water leg secured to 5 the outer portion of said firstframe andadaptedto seat against the outer wall of said water leg whereby tosustain said first portion against movement into the fire box, togetherwith a door opening inwardly into the box and a seat on the inner frameagainst which said door is sustained against outward pressure fromwithin the box,

. JEAN HOLLENDER.

